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Share-Based Compensation - Schedule of Compensation Cost for Restricted Stock Units (Details) - Restricted Stock - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total expense before income taxes | $ 1,084 | $ 979 | $ 3,611 | $ 3,471
Income tax benefit | (204) | (177) | (684) | (620)
Total expense after income taxes | 880 | 802 | 2,927 | 2,851
Cost of goods sold |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total expense before income taxes | (10) | 77 | 192 | 316
Selling, general and administrative expenses |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Total expense before income taxes | $ 1,094 | $ 902 | $ 3,419 | $ 3,155

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